/*  
 *  Copyright 2006 Paul Jack.
 *
 *  This file is part of the Dex compiler suite. 
 *  
 *  Dex is free software; you can redistribute it and/or modify it
 *  under the terms of the GNU General Public License as published by the
 *  Free Software Foundation; either version 2 of the License, or (at your
 *  option) any later version.
 *  
 *  Dex is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
 *  Public License for more details.
 *  
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
 */
package dex.compiler.model.expression;


import dex.compiler.model.base.Place;


/**
 * A string literal, such as <code>"Hello, nurse!\n"</code>.
 */
public class LiteralString extends Expression {
	
	
	/**
	 * The value of the literal.
	 */
	private String value;

	
	/**
	 * Constructs a new string literal. 
	 * 
	 * @param place  the place the literal originated in
	 * @param value  the value of the literal
	 */
	public LiteralString(Place place, String value) {
		super(place);
		this.value = value;
	}

	@Override
	public String toString() {
		StringBuilder sb = new StringBuilder();
		sb.append('\"');
		for (int i = 0; i < value.length(); i++) {
			char ch = value.charAt(i);
			if (ch == '\n') {
				sb.append("\\n");
			} else if (ch == '\r') {
				sb.append("\\r");
			} else if (ch == '\t') {
				sb.append("\\t");
			} else if (ch == '\\') {
				sb.append("\\\\");
			} else if (ch == '\"') {
				sb.append("\\\"");
			} else if ((ch >= 32) && (ch <= 127)) {
				sb.append(ch);
			} else {
				sb.append("\\u");
				sb.append(Integer.toOctalString(ch));
			}
		}
		sb.append('\"');
		return sb.toString();
	}


	/**
	 * Accepts a visit.
	 * 
	 * @param visitor  the visitor to accept
	 */
	public void accept(ExpressionVisitor visitor) {
		visitor.visitLiteralString(this);
	}

}
